37 SERVICES RELATING TO THE CONSTRUCTION OF COMMERCIAL BUILDINGS, SPECIALIZING IN THE STRUCTURAL DESIGN AND INSTALLATION OF ELECTRICAL, MECHANICAL, PLUMBING, AND FIRE PROTECTION
42 SERVICES RELATING GENERALLY TO SCIENTIFIC AND INDUSTRIAL RESEARCH, SPECIFICALLY SERVICES RENDERED COLLECTIVELY BY ENGINEERS AND/OR PHYSICISTS; SERVICES OF ENGINEERS ENGAGED IN VALUING, ESTIMATES, RESEARCH AND REPORTS